Cliff Swallow 6. Mayhew 1950 April 22 Poleline Bridge, 3 mi. N.E. of Davis, Yolo Co., Calif. English Sparrows have taken over nests 3-52 + 3-59, in addition to 3-30 noted before. A d was seen in 3-59, a ? in 3-52, & a ? again in 3-30. April 23 Bridge, 4 mi. west of Davis, Yolo Co., Calif. As there was water under the bridge today, I was unable to see how many new nests have been made this year. However, I was able to see that a Barn Swallow nest of last year has been taken over by a pair of Cliff Swallows this year. It was the Barn Swallow nest in the N.W. corner of section 1. The open nest of last year has been covered over the top with a wide mouth opening into it. April 27 Poleline Bridge, 3 mi. N.E. of Davis, Yolo Co., Calif. At 10:35 A.M. one bird fed another through the opening of the nest at nest 2-35. At 10 more out of 32 nests that I can see, the head of a bird is sticking out. Now there are 14 heads sticking out. Whenever a car goes by or over the bridge, all the birds in the air at the time fly out from under the bridge & circle in the air around. As soon as the car is gone, however, they return under the bridge. I am sitting approx. 20 ft. from the nearest nests, but my presence doesn't seem to bother them at all. Four times in the last 15 minutes a bird in 3-34 has left the nest to chase another bird away from in front of the nest opening: